In short
A workout timer runs work and rest periods in sequence and switches between them automatically, with a tone at each change so you never look at the screen mid-set. This page opens at 45 seconds of work, 15 seconds of rest, for 10 rounds.
- Default
- 45s work / 15s rest / 10 rounds
- Circuit training
- 45s / 15s across 8 to 12 stations
- Conditioning
- 40s / 20s for 10 rounds
- EMOM
- 60s work, no rest
Built for hands you cannot spare
The problem with timing a workout on a phone clock is that you have to look at it, and looking at it at the wrong moment costs you a rep. This one announces the switch with a tone, changes colour between work and rest, and shows the round number, so you can keep your eyes where they should be.
Prop the phone against a water bottle, or press Fullscreen on a laptop at the end of the mat.
Starting points that work
| Format | Work / rest | Rounds |
|---|---|---|
| Circuit training | 45s / 15s | 8–12 stations |
| Strength sets | 30s / 90s | 5 |
| Conditioning | 40s / 20s | 10 |
| EMOM | 60s / 0s | 10–20 |
| Tabata | 20s / 10s | 8 |
Warm up first, and time that too
Five to ten minutes of easy movement before intervals is not optional if you want the hard rounds to be any good. Use the 5 minute timer for the warm-up, then come back here for the working set.
Questions about the workout timer
Can I set uneven rounds, like a long finisher?
Run the main block here, then reset with the new numbers for the finisher. Each round in a single run uses the same work and rest lengths.
Does it keep the screen on during a workout?
It asks the device to stay awake while the timer runs, which most modern phones honour. If your screen still dims, raise the screen timeout in your display settings.
Will it still work if I lock my phone?
Yes. Locking the screen does not pause anything — the remaining time is worked out from the clock, not from how long the page has been visible. While the timer runs the site also asks your phone to keep the screen awake, so it will not dim on you mid-countdown.
Is there a limit on how many timers I can run?
No. Open the page in as many tabs as you like — each one counts independently and shows its own remaining time in its tab title.
Related timers
- Interval timerWork and rest rounds that switch automatically.
- HIIT timerHigh intensity intervals with audible round changes.
- Tabata timer20 seconds on, 10 off, eight rounds, four minutes.
- Rest timerKeep rest between sets honest.
- 1 minute timerCounts down 1 minute and rings.
- 30 minute timerCounts down 30 minutes and rings.